Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca3ffbe4fdb2a380…

MALICIOUS

PDF

34.1 KB Created: 2021-06-26 03:14:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 25c41ac7432993150270a7a39737231f SHA-1: 2381af353d4aea91533a93907a140b9dba4c3c92 SHA-256: ca3ffbe4fdb2a3803e3647248723fcf47c884b4b48d19484543a566eef46cc10
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links that redirect to malicious infrastructure, disguised as game hacks and generators. The primary redirector URL is http://netcdn.co/app/431946152/hack-for-counter-blox-roblox-game-hack. This indicates a phishing or scam attempt to lure users to potentially harmful websites. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/hack-for-counter-blox-roblox-game-hack In PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-without-human-verification-or-offers_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-html_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-wild-revolvers-hack_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-roblox-gift-card-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/tiktok-free-package_GM835599320.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-the-pizzeria-2021-money-hack_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/pubg-in-uc-hack_GM1330123889.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-spawn-things-hack-roblox_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/hacking-client-roblox_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-card-code-generator-download-free_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-pastebin-hack-give-gun_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-in-seconds_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000301d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x301D 21792 bytes
SHA-256: f3fa014112eefbb7edefe265fc0d696e867aaa588dc911e9c6afcc1b25ce0146
font_01_sfnt_off00006027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6027 19064 bytes
SHA-256: ef4aa6b6885e581b24a2c212d62dd60e152397910922ed7ff0dc903e0cca9531

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